Demographics & People — Lemont, Illinois

Population Overview

Population (Census)17,643
Estimated 2026~18,200
Median Age43.7
Total Households6,334
Family Households4,632
Average Household Size2.74
Diversity Index0.222 (somewhat diverse)

Race & Ethnicity

White15,565
Black or African American235
Asian265
Hispanic or Latino1,690

Heritage & Ancestry

GroupCount
Polish4,861
Irish2,760
German2,665
Unclassified or not reported2,615
Italian2,401
Other groups2,096
Lithuanian1,736
Hispanic: Hispanic or Latino1,222
Hispanic: Mexican1,099
English663

Language

English Only12,509
Spanish483
Population 5+16,801

Veterans

Veterans696
Population 18+13,474

Commuting

Mean Commute Time34.8 minutes
Work from Home17.1%
Commuter ProfileN/A
Source: Census ACS 5-Year 2023; Census ACS 5-Year 2023, Table B01003; Census ACS 5-Year 2023, B19013. Data for Lemont, Illinois.